Ventilator.



H. J. ROTH. VENTILATOR. APPLICATION Hum r113. 19, 1910.

Patented NOV. 8, 1910.

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H. J. ROTH. VENTILATOR. APPLICATION FILED FEB. 10, 1910.

' Patented Nov. 8, 1910.

2 SHEETS-SHEET 2.

HENRY J. ROTH, OF DOVER, MINNESOTA.

VENTILATOR.

. Specification of Letters Patent.

Patented Nov. 8, 1910.

Application filed February 10, 1910. Serial No. 543,111.

To all whom it may concern:

Be it known that I, HENRY J. ROTH, a citizen of the United States,residing at Dover, in the county of Olmsted, State of Minnesota, haveinvented certain new and useful Improvements in Ventilators; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable othersskilled in the art to whichit appertains to make and use the same.

This invention relates to ventilators and has special reference to aninduced draft ventilator.

One object of the invention is to provide a structure wherein animproved arrangement of ventilating and draft pipes will cause animproved manner of inducing a draft through the ventilating tubes.

Another object of the invention is to provide a novel stationarystructure arranged to induce draft in ventilating tubes no mat ter fromwhich direction the wind blows.

With the above and other objects in view, the invention consists ingeneral of certain ventilating tubes arranged in an improved manner inconnection with draft inducing tubes.

The invention further consists in certain novel details of constructionand combinations of parts hereinafter fully described, illustrated inthe accompanying drawings, and specifically set forth in the claims.

In the accompanying drawings, like characters of reference indicate likeparts in the several views, and Figure 1 is a side elevation of thepreferred form of the improved ventilator as applied to a railroad car.Fig. 2 is a vertical section through the center of such a ventilator.Fig. 3 is a bottom view of the ventilator. Fig. 4: is a top view of theventilator with the cap removed, the better to disclose the tubearrangement. Fig. 5 is a View of a modified form of the ventilator, thearrangement being such that the ventilator swivels about a vertical axisso as to face the wind no matter which direction it may blow.

In the preferred form of the invention the roof of a car is indicated at10 and through a suitable opening in this car roof extends a cylindricalcasing 11. The bottom of this casing projects within the car and isprovided with a damper 12 controlled by means of a lever 13. This casingalso extends well above the car and a thimble 11 is preferably fitted onthe car roof to keep moisture from working through the opening in saidroof. At the upper end of the casing 11 is a transverse partition 15provided with suitable openings to receive the upper ends of draft tubes16 which extend downwardly and thence extend outwardly through the sidesof the casing 11. The outer ends of these tubes are flared to form aspecies of trumpet shaped receiving end 17 preferably square in contouras can readily be seen by reference to Fig. 1. Above the upper end ofthe casing 11 is a cap or hood 18 which is supported on spaced arms 19and this cap or hood extends well over the casing 11 so that rain isprevented from passing down the tubes 16. Adjacent the lower end of thecasing 11 is a transverse partition 20 wherethrough extend the lowerends of ventilating tubes 21, the upper ends of these tubes extendinginto the tubes 16 and lying concentric with the axes of said tubes. Thelower ends of these ventilating tubes 21 terminate above the damper 12and are flared as at 22. By means of this construction the wind whichenters the ends 17 of the draft tubes passes up between the ventilatingtubes 21 and the draft tubes 16. Now, since the area of the annulusbetween one of the draft tubes and its ventilating tubes iscomparatively small when considered in connection with the mouth of thedraft tube the flow of air will be correspondingly rapid. This will havethe effect of creating a partial vacuum at the mouths of the-outlet endsof the ventilating tubes, said tubes terminating below the outlet endsof the tubes 16, and this partial vacuum will induce a draft throughsuch of the tubes 21 as may be affected thereby. The course of the airwill be readily observed by reference to an inspection of Fig. 2 whereinthe small arrows indicate the air currents.

In the preferred form of the ventilator as illustrated in Figs. 1 to 4it will be seen that the ends 17 of the draft tubes entirely surroundthe casing 11 so that no matter from which direction the wind may blowor in which direction the train is moving one or more of these drafttubes will constantly face the wind or draft and thus insure constantventilation. In the form shown in Fig. 5 but one ventilating tube isused and this ventilatingtube is without a casing as indicated at 23.The ventilating tube 23 is provided with a collar 24 held thereon by anysuitable means and on this tube is swiveled a draft tube 25 preciselysimilar in construction and arrangement to the draft tubes 16. Thisdraft tube 25 is provided with a downwardly extension 26 which rests onthe collar 24: so that the draft tube may rotate around the axis of theventilating tube. In this form there is provided a hood 27 secureddirectly to the draft tube 25 by means of braces 26, and directlyopposite the inlet end of the draft tube 25 is a vane 28 which serves tokeep the inlet end of the draft tube facing constantly in the directionin which the wind is blowing. In both of these forms it is to be notedthat the draft tube surrounds the ventilating tube in concentricrelation thereto and terminates above the top of said ventilating tube.

There has thus been provided a simple and efficient device of the kinddescribed and for the purpose specified.

Having thus described the invention, what is claimed as new, is

1. In a ventilating device, a vertical cylindrical casing, a transversepartition extending across the upper end of said casing and providedwith a series of spaced openings, a series of draft tubes having flaredinlet ends arranged around said casing and extending through the casing,said draft tubes being bent upwardly within the casing and havingcylindrical outlet ends held in the openings of said partition, a secondpartition adjacent the lower end of said casing and provided with aseries of openings equal in number to the draft tubes and immediatelybeneath said tubes, and a ventilating tube extending through each of theopenings in the lower partition and into a respective draft tube, eachof said ventilating tubes having its outlet end concentric with theoutlet end of the respective draft tube and terminating short of theoutlet end of said draft tube.

2. In a ventilating device, a vertical cylindrical casing, a transversepartition extending across the upper end of said casing and providedwith a series of spaced openings, a series of draft tubes having flaredinlet ends arranged around said casing and extending through the casing,said inlet ends being rectangular in outline and having their lateraledges contacting to entirely surround the casing, said draft tubes beingbent upwardly Within the casing and having cylindrical outlet ends heldin the openings of said partition, a second partition adjacent the lowerend of said casing and provided with a series of openings equal innumber to the draft tubes and immediately beneath said tubes, and aventilating tube extending through each of the openings in the lowerpartition and into a respective draft tube, each of said "entilatingtubes having its outlet end concentric with the outlet end of therespective draft tube and terminating short of the outlet ends of saiddraft tube.

3. In a ventilating device, a vertical cylindrical casing, a transversepartition extending across the upper end of said casing and providedwith a series of spaced openings, a series of draft tubes having flaredinlet ends arranged around said casing and extending through the casing,said draft tubes being bent upwardly within the casing and havingcylindrical outlet ends held in the openings of said partition, a secondpartition adjacent the lower end of said casing and provided with aseries of openings equal in number to the draft tubes and immediatelybeneath said tubes, a ventilating tube extending through each of theopenings in the lower partition and into a respective draft tube, eachof said ventilating tubes having its outlet end concentric with theoutlet end of the respective draft tube and terminating short of theoutlet end of said draft tube, and a damper at the bottom of saidcasing.

4:. In a ventilating device, a vertical cylin drical casing, atransverse partition extending across the upper end of said casing andprovided with a series of spaced openings, a

series of draft tubes having flared inlet ends arranged around saidcasing and extending through the casing, said inlet ends beingrectangular in outline and having their lateral edges contacting toentirely surround the casing, said draft tubes being bent upwardlywithin the casing and having cylindrical outlet ends held in theopenings of said partition, a second partition adjacent the lower end ofsaid casing and provided with a series of openings equal in number tothe draft tubes and immediately beneath said tubes, a ventilating tubeextending through each of the openings in the lower partition and into arespective draft tube, each of said ventilating tubes having its out letend concentric with the outlet end of the respective draft tube andterminating short of the outlet ends of said draft tube, and a damper atthe bottom of said casing.

In testimony whereof, I aflix my signature, in presence of twowitnesses.

HENRY J RUTH. WVitnesses:

E. E. RANK, H. Brown. I

